See that search box in the corner? That will give you multiple thread on Wing chun. You will quickly see the majority consensus about the chun. Sanshou, as long as they compete, is fine. I'd say focus on your BJJ for now.

Yeah, the consensus about the Chun looks bad.....hmmmmm. What about Jow Gar Kung Fu? There is a school close by as well and they do San Shou as well but I don't think they compete. The San Shou school I'm looking at do compete in Wushu and San Shou competitions. I'm leaning towards the San Shou as I think the striking and throws will compliment BJJ well.
Standing- San Shou
Clinch- San Shou
Ground- BJJ

Try the San Shou and then come back here and tell us how soon untill you get to spar. If they spar quickly, then you are good. If they say that they don't spar or they only spar at higher levels, then leave.

I'm leaning towards the San Shou as I think the striking and throws will compliment BJJ well.
Standing- San Shou
Clinch- San Shou
Ground- BJJ

Thoughts?

Solid. I train in Choy Li Fut/Longfist based Kung Fu with an emphasis on the San Da ruleset. I also do teh Chun (kind-of) and my WC based style has a serious lack of application when used solely for the purpose of getting the fight to the ground. My instructor has even told me that the clinch/takedown techniques he teaches almost exclusively come from Kempo and Dumog.

IMO, the Chun is useful to bridge the striking and clinching aspects of a fight, but not to be used as your primary style. What you have in mind looks good, but incorporating SOME Wing Chun into your style can be beneficial to what you are learning.

IMO, the Chun is useful to bridge the striking and clinching aspects of a fight, but not to be used as your primary style. What you have in mind looks good, but incorporating SOME Wing Chun into your style can be beneficial to what you are learning.

No. This is a refrain we hear a ton for many CMA styles. If you want to train something else for fun go ahead. Muay Thai and kickboxing do this well. Good Sanshou will do the same thing.

A thing to maybe worry about with the way you're thinking is as a beginning Sanda practitioner, I'm not all that convinced it's easy to go from Sanda style throws to groundwork.

Anecdotally I saw a Sanda-rules tournament last weekend with WC guys and even aikidoka competing. One WC guy did alright, but there were no apparent advantages to the style. He had long arms but didn't use his range, preferring to let people come close, land a few strike and get thrown. Hardly representative of course.

Sanda / Sanshou will teach you awesome counters to people striking you.

Sanshou is good but it's a modern sport, not a traditional art. BJJ is a great complement to CMA because the ground it pretty much a universal weakness in CMA. I guess it could go the other way around too. I don't see why some CMAs would complement BJJ better than others... I guess the internal arts and Baji would be good since they like to get close, and BJJ tends to be more internal or soft as well. Tim Cartmel is a well-known example of this at shenwu.com.

With CMA as with most arts the instruction matters much more than the style.